Denmark has linked an incident involving drones over its main airport to a series of recent drone incursions across Europe blamed on Russia, and other disruptions.

Drones were flown over Copenhagen Airport for hours on Monday, local time, disrupting flights, in what was the most serious attack yet on Denmark's critical infrastructure.

NATO members slam Russia for fighter jet incursions Photo shows Woman wearing a blue jacket speaks into a mic.

Allies say they will not hesitate to shoot down Russian jets which violate NATO airspace, after two jets entered Estonia's skies last week.

Danish Prime Minister Mette Frederiksen said the drone activity seemed designed "to disrupt and create unrest", though authorities refrained from naming suspects.

Sightings of two or three large drones ne

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